231023135 has 16 divisors (see below), whose sum is σ = 327758400. Its totient is φ = 152952576.

The previous prime is 231023119. The next prime is 231023141. The reversal of 231023135 is 531320132.

231023135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231023135 - 2⁴ = 231023119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112790 + ... + 114819.

It is an arithmetic number, because the mean of its divisors is an integer number (20484900).

Almost surely, 2^231023135 is an apocalyptic number.

231023135 is a deficient number, since it is larger than the sum of its proper divisors (96735265).

231023135 is a wasteful number, since it uses less digits than its factorization.

231023135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227650.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 231023135 is about 15199.4452201388. The cubic root of 231023135 is about 613.5997269127.

Adding to 231023135 its reverse (531320132), we get a palindrome (762343267).

The spelling of 231023135 in words is "two hundred thirty-one million, twenty-three thousand, one hundred thirty-five".